CN215969922U

CN215969922U - Accelerated ejection thimble structure for injection mold

Info

Publication number: CN215969922U
Application number: CN202122546117.8U
Authority: CN
Inventors: 罗书明
Original assignee: Yohenjacen Precision Mould Shenzhen Co ltd
Current assignee: Yohenjacen Precision Mould Shenzhen Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-03-08
Anticipated expiration: 2031-10-22

Abstract

The utility model discloses an accelerated ejection thimble structure for an injection mold, which comprises a lever part, a pin shaft, a thimble, an upper ejector rod and a lower ejector rod, wherein an installation cavity is arranged between a thimble panel and a thimble bottom plate of a mold frame, the lever part is pivoted in the installation cavity through the pin shaft horizontally arranged in the middle, two ends of the lever part are respectively provided with a working end and a jacking end, the working end is movably clamped with the end head of the thimble at the bottom of the thimble, and the upper ejector rod and the lower ejector rod are respectively and correspondingly arranged right above and below the jacking end and can respectively push the jacking end at the later stage of an ejection reset stroke. The accelerated ejection thimble structure for the injection mold can accelerate ejection of products, improve ejection stroke and simplify mold structure.

Description

Accelerated ejection thimble structure for injection mold

Technical Field

The utility model relates to the technical field of injection molds, in particular to an accelerated ejection thimble structure for an injection mold.

Background

At present, an injection mold is matched with a plastic molding machine in the plastic processing industry, a plastic product is endowed with a tool with complete configuration and accurate size, when the mold has a deep bone position or the required demolding stroke force is large, a traditional lower thimble structure is used, a long thimble is needed to completely eject a product out of a rear mold core, and meanwhile, the supporting height of square iron and the length of a return spring need to be increased, namely, the moving stroke of the thimble is increased, so that the integral height of the mold is increased.

Therefore, it is necessary to develop an ejection accelerating thimble structure for an injection mold to address the above drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an accelerated ejection thimble structure for an injection mold, which can accelerate ejection of a product, improve ejection stroke and simplify the mold structure.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model relates to an accelerated ejection thimble structure for an injection mold, which is arranged on a mold frame and comprises a lever part, a pin shaft, a thimble, an upper ejector rod and a lower ejector rod, wherein an installation cavity is arranged between a thimble panel and a thimble bottom plate of the mold frame, the lever part is pivoted in the installation cavity through the pin shaft horizontally arranged in the middle, two ends of the lever part are respectively provided with a working end and a pushing end, the working end is movably clamped with the end head of the thimble at the bottom of the thimble, and the upper ejector rod and the lower ejector rod are respectively and correspondingly arranged right above and below the pushing end and can respectively push the pushing end at the later stage of an ejection resetting stroke.

Furthermore, the thimble end is an expanded cylindrical end, the working end is provided with an outward U-shaped opening, the top wall of the U-shaped opening is provided with a top opening outwards, and the thimble end is movably clamped in the U-shaped opening.

Furthermore, the height of the U-shaped opening is matched with the end of the thimble, an upper groove is formed in the top of the inner side of the U-shaped opening, and a abdicating oblique angle is formed in the bottom of the outer side of the U-shaped opening.

Furthermore, the ejector pin is provided with a flat milling part at the root part connected with the end of the ejector pin, and the width of the flat milling part is matched with the top opening.

Furthermore, the distance from the jacking end to the axis of the pin shaft is smaller than the distance from the working end to the axis of the pin shaft.

Furthermore, the top moving end is in the shape of an arc head, the upper ejector rod faces the bottom end of the top moving end and is provided with an expanded cylindrical end, and the top end of the upper ejector rod vertically extends upwards out of the guide through hole of the ejector pin panel and then can be abutted to the bottom surface of the lower template of the die carrier.

Furthermore, the bottom of the lower ejector rod is embedded into a bottom plate of the die carrier, and the top end of the lower ejector rod penetrates through the through hole in the ejector pin bottom plate and can be abutted to the ejector end.

Compared with the prior art, the utility model has the beneficial technical effects that:

the utility model discloses an accelerated ejection thimble structure for an injection mold, which has the beneficial effects that:

according to the accelerated ejection thimble structure for the injection mold, the working end of the lever piece is movably clamped with the end of the thimble, so that the upper ejector rod can push the ejector end at the later stage of the ejection stroke, the working end is pried to swing upwards quickly, and the thimble is pushed to eject quickly. Through the setting of ejector pin down, can upwards promote the top end at the later stage that the stroke that resets is about to end, prize the quick downward swing of work end, and then the pulling thimble resets fast. Meanwhile, under the condition that the length of the ejector pin is not increased, the requirement of the ejection stroke is met by prying the lever, and the height of the die is reduced. The accelerated ejection thimble structure for the injection mold can accelerate ejection of products, improve ejection stroke and simplify mold structure.

In addition, the end of the ejector pin is arranged to be an expanded cylindrical end, and the ejector pin is movably clamped in the U-shaped opening, so that the ejector pin can be pulled upwards and downwards in a two-way mode. Through U-shaped opening both sides set up the upper groove respectively and abdicate oblique angle, can guarantee when ejecting, lever piece beat the back, thimble end edge with the U-shaped opening does not take place to interfere, simultaneously U-shaped open-ended height suits with the thimble end, can not produce great axial clearance, has guaranteed the precision that resets of thimble. Milling flat parts are arranged on two sides of the root part of the thimble, and the top opening is clamped to the milling flat parts, so that the thimble is prevented from rotating in the reciprocating motion process. The length of the power arm provided with the lever piece is smaller than that of the resistance arm, so that large displacement can be obtained at the resistance end, and the ejector pin can be ejected out or returned quickly. The top of going up the ejector pin contacts butt lower bolster bottom surface, is convenient for transmit thrust to the top end for the thimble is ejecting fast, accomplishes the demolding, avoids excessive continuation extrusion pressure spring that resets, has protected the pressure spring that resets. The bottom of the lower ejector rod is embedded into the bottom plate of the die carrier, so that the positioning accuracy of the position of the lower ejector rod is guaranteed, and the ejector pin is guaranteed to reset accurately and quickly.

Drawings

The utility model is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic cross-sectional structural view of an injection mold provided with an accelerated ejector pin structure for the injection mold of the present invention;

FIG. 2 is a schematic cross-sectional view of the lever member according to the present invention;

fig. 3 is a structural schematic diagram of a rapid ejection state of the accelerated ejection thimble structure for the injection mold of the utility model.

Description of reference numerals: 1. a base plate; 2. a thimble base plate; 3. a thimble panel; 4. a rear mold core; 5. a front mold core; 6. a lever member; 601. a working end; 6011. an upper groove; 6012. a abdication bevel angle; 602. a jacking end; 603. a pin shaft hole; 604. the top is open; 7. a pin shaft; 8. a thimble; 801. the end of the thimble; 802. milling a flat part; 9. an ejector rod is arranged; 10. a lower ejector rod; 11. a baseplate insert; 12. and a pressure spring is reset.

Detailed Description

The core of the utility model is to provide an accelerated ejection thimble structure for an injection mold, which can accelerate ejection of products, improve ejection stroke and simplify mold structure.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to the accompanying drawings, fig. 1 is a schematic cross-sectional structural view of an injection mold provided with an accelerated ejection thimble structure for the injection mold of the present invention; FIG. 2 is a schematic cross-sectional view of the lever member according to the present invention; fig. 3 is a structural schematic diagram of a rapid ejection state of the accelerated ejection thimble structure for the injection mold of the utility model.

In a specific embodiment, as shown in fig. 1 to 3, the ejector pin structure for accelerating ejection of an injection mold of the present invention is disposed on a mold base, and includes a lever member 6, a pin 7, an ejector pin 8, an upper ejector pin 9, and a lower ejector pin 10, which are used in a set. A mounting cavity is arranged between the thimble panel 1 and the thimble base plate 2 of the die carrier, a pin shaft hole 603 in the middle of the lever piece 6 is pivoted in the mounting cavity through a pin shaft 7 which is horizontally arranged, and two ends of the pin shaft 7 are embedded between the thimble panel 1 and the thimble base plate 2. Two ends of the lever member 6 are provided with a working end 601 and a pushing end 602, the working end 601 is movably clamped with a thimble end 801 at the bottom of the thimble 8, and the top end of the thimble 8 extends into a cavity between the rear mold core 4 and the front mold core 5. The upper ejector rod 9 and the lower ejector rod 10 are respectively and correspondingly arranged right above and right below the ejection end 602 and can respectively push the ejection end 602 at the later stage of the ejection and reset stroke.

Through the movable joint thimble end 801 of the work end 601 of the lever 6, the upper ejector rod 9 can push the ejector end 602 at the later stage of the ejection stroke, and the work end 601 is pried to swing upwards quickly, so that the thimble 8 is pushed to eject quickly. Through the setting of lower ejector pin 10, can be at the later stage that the stroke that resets is ending, upwards promote top end 602, pry work end 601 and swing down fast, and then pull thimble 8 and reset fast. Meanwhile, under the condition that the length of the ejector pin 8 is not increased, the requirement of ejection stroke is met by prying the lever, and the height of the die is reduced. The accelerated ejection thimble structure for the injection mold can accelerate ejection of products, improve ejection stroke and simplify mold structure.

In an embodiment of the present invention, as shown in fig. 1 to 3, the thimble end 801 is an enlarged cylindrical end, the working end 601 is configured as an outward U-shaped opening, a top opening 604 is formed on a top wall of the U-shaped opening, and the thimble end 801 is movably clamped in the U-shaped opening. Meanwhile, the long rod of the thimble 8 is positioned in a vertical guide hole on the lower template of the die carrier for guiding and sliding connection.

Specifically, as shown in fig. 2, the height of the U-shaped opening is adapted to the thimble end 801, an upper groove 6011 is disposed at the top of the inner side of the U-shaped opening, and an abdicating bevel 6012 is disposed at the bottom of the outer side of the U-shaped opening.

Specifically, as shown in fig. 2 and 3, the thimble 8 is provided with milled flat portions 802 on both sides of the root portion connecting the thimble end 801, and the width of the milled flat portions 802 is adapted to the top opening 604.

The thimble end 801 is set to be an expanded cylindrical end and is movably clamped in the U-shaped opening, so that the thimble 8 can be pulled upwards and downwards in two directions. Through set up upper groove 6011 and abdication oblique angle 6012 respectively U-shaped opening both sides, can guarantee during ejecting, lever piece 6 beat the back, thimble end 801 edge with the U-shaped opening does not take place to interfere, simultaneously the height of U-shaped opening suits with thimble end 801, can not produce great axial clearance, has guaranteed the precision that resets of thimble 8. Milling flat parts 802 are arranged on two sides of the root part of the thimble 8, and the top opening 604 is clamped to the milling flat parts 802, so that the thimble 8 is prevented from rotating in the reciprocating process.

In an embodiment of the present invention, as shown in fig. 1 to 3, a distance from the top moving end 602 to the axis of the pin 7 is smaller than a distance from the working end 601 to the axis of the pin 7.

The length of the power arm provided with the lever part 6 is smaller than that of the resistance arm, so that large displacement can be obtained at the resistance end, and the ejector pin 8 is enabled to be ejected out or returned fast.

In an embodiment of the present invention, as shown in fig. 1 and fig. 3, the ejector end 602 is in an arc head shape, the bottom ends of the upper ejector rods 9 facing the ejector end 602 are all provided with an enlarged cylindrical end, and the top ends of the upper ejector rods 9 vertically extend upward out of the guide through holes of the ejector pin panel 1 and can abut against the bottom surface of the lower template of the mold frame.

Specifically, as shown in fig. 1, the bottom of the lower ejector rod 10 is embedded into the bottom plate 1 of the formwork, and the bottom end of the lower ejector rod 10 is provided with an enlarged head and is pressed by the bottom plate insert 11. The top end of the vertically arranged lower ejector rod 10 passes through the upper through hole of the ejector pin base plate 2 and can be abutted to the top moving end 602.

The top end of the upper ejector rod 9 is in contact with and abutted to the bottom surface of the lower template, so that the thrust is conveniently transmitted to the top end 602, the ejector pin 8 is quickly ejected out, the mold stripping is completed, the excessive continuous extrusion of the reset pressure spring 12 is avoided, and the reset pressure spring 12 is protected. The bottom of the lower ejector rod 10 is embedded into the bottom plate 1 of the die carrier, so that the positioning accuracy of the position of the lower ejector rod 10 is guaranteed, and the ejector pin 8 is guaranteed to reset accurately and quickly.

The accelerated ejection thimble structure for the injection mold works in a specific embodiment: when the injection mold is demoulded, the process of ejecting a product by the ejector pins 8 is required to be as follows, the ejection work under the machine table pushes the ejector pin panel 1 and the ejector pin bottom plate 2 to move upwards, the product is ejected from the top ends of the ejector pins 8, after the ejector pin plate is ejected by 48 mm, the top ends of the upper ejector rods 9 are in contact with and abutted against the bottom surface of the lower mold plate, the bottom ends of the upper ejector rods 9 push the ejector moving ends 602, the prying working ends 601 swing upwards quickly, and then the ejector pins 8 are pushed to eject the residual distance of 3 mm quickly. When the ejector pin plate is retreated to the lower ejector pin 10 for action during return reset, the ejector end 602 is pushed upwards, the prying working end 601 swings downwards quickly, and then the ejector pin 8 is pulled to reset quickly and accurately.

According to the accelerated ejection thimble structure for the injection mold, the working end 601 of the lever piece 6 is movably clamped with the thimble end 801, so that the upper ejector rod 9 can push the ejector end 602 at the later stage of the ejection stroke, the working end 601 is pried to swing upwards quickly, and the thimble 8 is pushed to eject quickly. Through the setting of lower ejector pin 10, can be at the later stage that the stroke that resets is ending, upwards promote top end 602, pry work end 601 and swing down fast, and then pull thimble 8 and reset fast. Meanwhile, under the condition that the length of the ejector pin 8 is not increased, the requirement of ejection stroke is met by prying the lever, and the height of the die is reduced. The accelerated ejection thimble structure for the injection mold can accelerate ejection of products, improve ejection stroke and simplify mold structure. In addition, the thimble end 801 is arranged to be an expanded cylindrical end and movably clamped in the U-shaped opening, so that the thimble 8 can be pulled upwards and downwards in two directions. Through set up upper groove 6011 and abdication oblique angle 6012 respectively U-shaped opening both sides, can guarantee during ejecting, lever piece 6 beat the back, thimble end 801 edge with the U-shaped opening does not take place to interfere, simultaneously the height of U-shaped opening suits with thimble end 801, can not produce great axial clearance, has guaranteed the precision that resets of thimble 8. Milling flat parts 802 are arranged on two sides of the root part of the thimble 8, and the top opening 604 is clamped to the milling flat parts 802, so that the thimble 8 is prevented from rotating in the reciprocating process. The length of the power arm provided with the lever part 6 is smaller than that of the resistance arm, so that large displacement can be obtained at the resistance end, and the ejector pin 8 is enabled to be ejected out or returned fast. The top end of the upper ejector rod 9 is in contact with and abutted to the bottom surface of the lower template, so that the thrust is conveniently transmitted to the top end 602, the ejector pin 8 is quickly ejected out, the mold stripping is completed, the excessive continuous extrusion of the reset pressure spring 12 is avoided, and the reset pressure spring 12 is protected. The bottom of the lower ejector rod 10 is embedded into the bottom plate 1 of the die carrier, so that the positioning accuracy of the position of the lower ejector rod 10 is guaranteed, and the ejector pin 8 is guaranteed to reset accurately and quickly.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.

Claims

1. The utility model provides an injection mold is with ejecting thimble structure with higher speed, sets up on the die carrier, its characterized in that, including lever spare (6), round pin axle (7), thimble (8), go up ejector pin (9) and ejector pin (10) down, be provided with the installation cavity between thimble panel (3) and the thimble bottom plate (2) of die carrier, lever spare (6) set up through the middle part level round pin axle (7) pin joint is in the installation cavity, the both ends of lever spare (6) set up to work end (601) and top end (602), work end (601) activity joint thimble end (801) of thimble (8) bottom, it is in to go up ejector pin (9) and lower ejector pin (10) corresponding the setting respectively directly over top end (602) and under and can promote respectively in ejecting stroke later stage that resets top end (602).

2. The structure of an accelerated ejector pin for an injection mold according to claim 1, characterized in that: thimble end (801) is the cylindrical end of inflation, work end (601) set up to U-shaped opening outwards, open-top (604) are seted up outwards on the roof of U-shaped opening, thimble end (801) activity joint is in the U-shaped opening.

3. The structure of an accelerated ejector pin for an injection mold according to claim 2, characterized in that: the height of the U-shaped opening is matched with that of the thimble end (801), an upper groove (6011) is arranged at the top of the inner side of the U-shaped opening, and a abdicating oblique angle (6012) is arranged at the bottom of the outer side of the U-shaped opening.

4. The structure of an accelerated ejector pin for an injection mold according to claim 2, characterized in that: the ejector pin (8) is provided with a milling flat part (802) at the root part connected with the end head (801) of the ejector pin, and the width of the milling flat part (802) is adapted to the top opening (604).

5. The structure of an accelerated ejection thimble for an injection mold according to any one of claims 1 to 4, wherein: the distance from the jacking end (602) to the axis of the pin shaft (7) is smaller than the distance from the working end (601) to the axis of the pin shaft (7).

6. The structure of an accelerated ejector pin for an injection mold according to claim 5, wherein: the ejector pin panel is characterized in that the ejector pin end (602) is in an arc head shape, the upper ejector pin (9) faces towards the bottom end of the ejector pin end (602) is arranged to be an expanded cylindrical end, and the top end of the upper ejector pin (9) vertically extends upwards to extend out of a guide through hole of the ejector pin panel (3) and then can be abutted to the bottom surface of the lower template of the die carrier.

7. The structure of an accelerated ejector pin for an injection mold according to claim 6, wherein: the bottom of the lower ejector rod (10) is embedded into the bottom plate (1) of the die carrier, and the top end of the lower ejector rod (10) penetrates through the through hole in the ejector pin bottom plate (2) and can be abutted to the ejector end (602).